运行后，点击加载图片按钮，左边的控件会显示图片。此时左键按住图片，拖动，到右边控件上方后释放左键，此时图片被复制。-First,run it, click the "Load Picture" button, the left control will display the picture. At this time hold down the left mouse button over the picture, drag, and release it after having moved